<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .box{
            width: 200px;
            height: 200px;
            background-color: pink;
            /* border: solid 3px blue; */
            /* solid 实线 dashed 虚线 dotted 点线 */
            border: 3px dotted blue;
            border-top: 3px dotted red;
        }
        input{
            width: 490px;
            height: 30px;
            border: 2px solid red;
            font-size: 14px;
        }
    </style>
</head>
<body>
    <div class="box"></div>
    <br>
    <input type="text" placeholder="平板">
</body>
</html>